BuddyPress Toolbar plugin - only display for admins / super admins -- add to functions.php file of theme/child theme:

gistfile1.aw

<?php

add_action( 'wp_before_admin_bar_render', 'ddw_bptb_admin_only' );
/**
 * BuddyPress Toolbar for Admins only
 *
 * NOTE: Should work fine for plugin versions 1.0 and 1.1
 *
 * @author David Decker - DECKERWEB
 * @link   http://genesisthemes.de/en/
 * @link   http://twitter.com/deckerweb
 */
function ddw_bptb_admin_only() {
	global $wp_admin_bar;

	if ( !is_super_admin() || !current_user_can( 'administrator' ) ) {
		$wp_admin_bar->remove_menu( 'ddw-buddypress-admin-bar' );
	}
}